Senior IT Security Analyst

Salary: £33,000 - 73,000 per year

Requirements:

• Significant experience within cyber security, information security or security operations.
• Experience in several of the following areas: Security Operations, Security Incident Response or Security Engineering.
• Experience with Security Information and Event Management (SIEM) and Endpoint Detection & Response (EDR) technologies.
• Experience in Identity and Access Management, including MFA, Conditional Access and Privileged Access.
• Experience with Data Loss Prevention (DLP) technologies and policy management.
• Experience in Vulnerability Management and security hardening.
• Experience in security architecture reviews and technical assurance.
• Experience in threat detection, investigation and root cause analysis.
• Experience in security automation, scripting or workflow improvement.
• Familiarity with recognised security frameworks such as NIST CSF, ISO 27001, CIS Controls or the NCSC Cyber Assessment Framework.
• Professional certifications such as CISSP, CISM or CISA are desirable but not essential if equivalent experience can be demonstrated.

Responsibilities:

• Lead the investigation and response to complex cyber security incidents across cloud, endpoint, identity, network, email and application environments.
• Drive improvements to our Security Operations capability through enhanced detections, playbooks, automation and operational processes.
• Own and enhance key security controls, including Data Loss Prevention (DLP) and Multi-Factor Authentication (MFA), ensuring they remain effective, measurable and aligned with business needs.
• Assess vulnerabilities, prioritise remediation activities and work with technology teams to reduce cyber risk across the organisation.
• Provide security assurance for new projects and technology changes, helping embed security by design.
• Produce meaningful security metrics and reporting for technical and business stakeholders.
• Coach and mentor colleagues, sharing knowledge and raising security capability across the organisation.
• Translate complex technical issues into clear, practical recommendations that support informed business decisions.

Technologies:

• Cloud
• Support
• Network
• Security

More:

At Lumentum, we develop the technologies that power the worlds most advanced communications, industrial and cloud infrastructure. We are seeking an experienced Senior Information Security Analyst to help protect our people, data and global operations in Caswell, Northamptonshire, UK. This full-time role offers the opportunity to join a collaborative cyber security team, work across cloud, identity, endpoint, network and data security, and make a genuine impact protecting critical business services. We offer exposure to modern cloud and security technologies, ongoing professional development and learning opportunities, a supportive team environment, and the chance to influence enterprise-wide cyber security in a global organisation that values innovation, collaboration and continuous learning. We are an equal opportunity employer and value diversity at our company.

last updated 36 week of 2026